Crusher



Dec, 23,' 1924. D. J.' NEVILL cRUsHER y Filed May 28, 1920 2Sheets-Sheet 2 Q Q Se o l o l\- b d f Il Ian' f Jini' Q W n lo INVENToR.D J NE w1. L.

Patented Dec. 23, 1924.

UNITED STATES DAVID J'. NEVILL, OF DENVER, COLORADO, ASSIGNORTO THESTEARNS-ROGER MANU'- N Lszazaz PATENT orf-Fica.

FACTURING COMPANY, A CORPORATION OF COLORADO.

CRUSHER.

Application led May 28, 1920. Serial No. 384,884.

To all whom t may concern.'

Be it known that I, DAVID J. NEVILL, a subject of George V, King ofEngland, residing at Denver, in the county of Denver and State ofColorado, have invented certain new and useful Improvements in Crushers,of which the following is a specication.

This invention relates to improvements in crushers of the type in whichAa pivotally suspended jaw has a reciprocating motion opposite to arelative stationary jaw and its primary object is to provide in acrushing machine of this character, means for transferring the thrust ofthe moving jaw to an end of the frame on which the cooperating parts ofthe crushing mechanism are assembled, whereby to relieve the body ofmost of the strains resulting from the crushing pressure.

Another object of the invention is to provide by the application of thethrust transferring means above referred to, an effective and readilyoperativemedium for adjusting the distance between the crushing jaws tocompensate for wear and to allow of varying the size of the product ofthe machine, and still another object is to so arrange the parts of thethrust transmitting and jaw-adjusting means that in case of breakage ofany part thereof the movement of the moving jaw will not react upon thesupporting frame.

I obtain the above objects by providing the frame of a crushing machineof the type above referred to, with a slidway open at an end thereof andmounting in said slideway a cross-head which receives the thrust of themoving jaw through the usual toggle movement and which is connected tothe opposite end of the supporting structure by means of a pair ofparallel side rods. Nuts on the rods provide convenient means forvarying the distance between the crushing jaws by adjustment of thecross-head in its slide-way for the purposes hereinbefore described.

An embodiment of my invention has been illustrated in the drawingsaccompanying l and forming part of this specification, in the two viewsof which coresponding parts have been designated by similar charactersof reference and in which-ff Fig/ure l represents a verticallongitudinal,

section through a jaw crusher to which my improvements are applied;

Figure 2, a horizontal section taken on the line 2 2, Figure 1, and

Figure 3, an enlarged sectional elevation of the end of one of thetoggles and its seat,

The crushing machine as shown in the drawings consists of a supportingframe having in integral connection, parallel side members 5, a coredfront end member 6 and a rear end member consisting of top and bottomparts 7 and 8 which are spaced in. parallel relation to form a slide-wayfor the cross head 16. l

The essential operating mechanism of the crusher comprises a stationaryjaw 9 rigidly mounted upon the front end member of the supporting frame,a movable jaw 10 pivoted at its upper end in bearingsjon the sidemembers of the same and an actuating mechanism'for the movable jawconsisting ofthe shaft 12 eccentrically supported in boxes on the sidemembers of the frame', a pitman 13 suspended from the shaft and togglemembers 14 and 15 loosely engaging with preferably semi-cylindricalconvex seats at opposite sides of the lower end of the pitman andbearing respectively upon similarly formed seats on the movable jaw andthe sliding cross-head.

The movable jaw is rovided with a hard metal wear plate 29, w ich issecured at its lower end by means of a projecting dovetail lug 28 fittedin the lower portion of` an elongated recess 27 of the jaw. Angularindentations 30 in the upper and lowerends of the wear plate. eachprovide a seat for a block 31 which by means of a bolt 32 extendingthrough an aperture in the body portion of the jaw, and a nut 33,secures the upper end of the plate against displacement. A seconddove-tail lug 28a at an equal distance from the opposite end of the wearplate extends loosely in another recess 27a of the jaw. and its functionis to secure the wear plate at its lower end in a reversedposition.

The cross-head consists in its preferred form of` a channeled bodymember 17 having at its opposite ends grooves' to admit the rods 18 bywhich the cross head is connected to the front end of the frame, A block19 removablymtted is @as haar member bithesa fel-0 head has alongitudinal recess in its forward side and carries in said recess areinovable bearing strip 2O which provides the above mentioned seat forthe toggle meinber l5.

The cross-head is slidably fitted in the open-ended slide-way formedbetween the side members and the upper and lower sections of the rearend member of the supporting frame for its unobstructed movement ineither direction.

The rods 18 extend loosely through openings in the front member of theframe and through the grooves at the ends of the crosshead, and they arethreaded at their other ends for the application of nuts 2l and 22. Theloose connection between the rods and the cross-head thus providedpermits of the cross-head disengaging itself from the other rod should,in the operation of the inachine, the other rod be broken.

The nuts 2l screwed upon the ends of the rods at the front of themachine are set partially in recesses to prevent their rotation and thenuts 22 screwed upon the opposite ends of the rod against the back ofthe crossshead are connected by a locking bar 23 which prevents-.theirdisplacement after the cross-head has been adjusted to its position inwhich the crushing jaws are the proper distance apart.

The locking bar consists in its preferred form ofza rod the end portionof which is bent at right angles to be inserted in sockets formed in thesides of the nuts as shown in Figure l of the drawings.

The operating parts of the machine are as usual maintained in theirrelative positions .by tension rods 24 and buffer springs 25 cooperatingtherewith to yieldingly oppose the 'operative movement of the swinging jaw.

In the operation of the improved crushing machine the eccentric shaft isrotated by power applied to a'pulley 26 causing an up `and downwardmovement of the pitinan which through the instrumentality ofthe togglesVi-s converted into a reciprocating motion of the swinging aw.

The material'to be crushed isfed between Ythe .jaws and passes throughthe space be- .tween the low r ends thereof after having been reduced tothe desired lineness.

The thrust of the swing-ing jaw due to its reaction during the crushingoperation is received by the Sliding cross-head which in turn transfersit to the front end of the supporting frame through the medium of therods thereby relieving the body of the Ytrame from the strains to whichit would ordinarily be subjected by the crushing pressure of theoperating mechanism.

By turning` thenuts 22 upon thev threaded rear ends :ofthe rods thesliding cross head may be 1adjusted to vary the distance between thecrushing jaws for thepurpose of taking up wear or changing the size ofthe product of the machine, it being understood that after theadjustment has been made the locking bar fastens the nuts againstfurther displacement.

ln case of breakage of any part of the thrust-receiving and transmittingelement of the machine the cross-head is merely pushed rearwardly in andthrough the open ended slide-way in which it works, thereby preventingundue strains and ultimate damage to the supporting structure as mayreadily occur when the frame receives the entire crushing pressure.

lvVhat l claim and desire to secure by Letters Patent is:

l. ln a Crusher, a frame having slide ways7 a movable jaw,v an abut-mentmounted in said ways to slideby a stress on said jaw. a toggle movementoperating the j awby reaction on the abutment, and rods connecting thesliding abutment to the opposite end of the frame. Y q

2. ln a Crusher, a frame, a movable jaw, an abutment grooved at its endsand slidably mounted at an end of the frame, rods loosely held in saidgrooves and connected to the opposite end ofthe frame, and a toggleInoveinent operating th-e jaw by reaction on the abutment.

3. ln a Crusher, the combination with a rcciprocatory jaw and a rotarydriving ele* ment, of a toggle for the operation of the jaw by movementof said element, including` a niovement-transmitting member having atlat end-face and a seat having a ridge in Contact with said face alonga relatively transverse straight line.

4. In. a crusher, the combination with a reciprocatory jaw and a rotarydriving elcment therefor, of a toggle for the operation of the jaw bymovement of said element including a movement-translnitting member and ascat for said member, having a str transversely rounded ridgeV inContact with said face along a yrelatively transverse straight line.

5. ln a jaw Crusher, the combination with a stationary jaw, of a jawcomprising a niova-bly mounted body having a fa e opposed to the workingface of the stationary jaw, a wear plate resting against said face osaid body and covering the same inclusive of the lowerinost edgethereof, and means for fastening the plate to the jaw body at the upperend of the plate7 the plate having a dove-tailed lug projecting from itsrear ward lface in spaced relation to the lower edge thereof, and thejaw body having in its forward face with which the plate engages, acorrespondingly shaped recess adapted to admit the luO'.

6. In a aw Crusher, the combination with a stationary jaw, of a jawcomprising a niovably mounted body having a face oppo llD site to theWorking face of the stationary jaw, a Wear plate resting against saidface of said body and covering the same inclusive of the lonf'erlnostedge thereof, and means for fastening the plate to the jaw body at theupper end of the jaw, the plate having 'dovetailed lugs projecting fromits rearward face in spaced relation to the upper and lower ends thereofand the jaw body having in its forward face' with which the plateengages, correspondingly shaped recesses adapted to admit the lugs.

In testimony whereof I have affixed my signature.

DAVID J. NEVILL.

